free trade 自由贸易
free trade zone 自由贸易区
free-lance professionals 自由职业人员
key project 重点项目
national key projects 国家重点工程
South-to-North water diversion 南水北调
West-East electricity transmission project 西电东送
West-east natural gas transmission project 西气东输
the north-south gap 南北差距
surplus rural labor 农村富余劳动力